Nozzle for air brushes



July 28, 1925. 1,547,349 c. L. REICHENBACH NOZZLE FoR AIR BRUSHESRiledgqne 2. 1925 INVENToR Patented July. 2s, 1925,

UNITED STATES' PATENT o-FFICE.

.CARL I.. REICEENBACH, or YoNxEns, NEW Yonx, -AssrGNon ronownan w,BEACH, `4or NEWARK, NEwJnnsnY.

NOZZLE 10B AIB BRUSHES.

appunti@ mea :une 2, 1923. serialv No. 842,951.

To all fwlom t myconcem:

Be it known that I, CARL L, REICHENBACH, a citizen of the United States,and a resident of Yonkers, county of Westchester, and 5 State of NewYork, have invented certain new andv Iuseful Improvements in Nozzles forAir Brushes, of which the following is a specification. l i Thisinvention relates to an improved nozzle for air brushes, which nozzle isconstructed to more eiiciently and economically' apply a coating ofpaint and other liquids or semi-liquids, and to produce a more even andsmooth. application or coat on the surface treated. The inventionis-particularly adapted for applying heavy materials and viscousmaterials with a comparatively low` air pressure at the nozzle, and forapplying lighter materials with a relatively low air pressure.

The invention is illustrated in the accom- ,panying drawing', in which.Figure 1 is a side view ofan air brush with a part thereofv shown insection to indicate the attachment 2? of the parts of the nozzle. Figure2 is an enlarged section of the nozzle shown in Figure 1. v Figures 3and 4 are similar views of modified forms of nozzles,fand Figure 5 is asimilar view of -a further modification, and4 Figure is a front view ofthe inner member of Figure 5.

.The nozzle is applicable to any of thev 'types of air brushes, butIshow it a plied to a brush of the 'type shown inlllnited States PatentNo. 1,430,533, dated ``Oct. 3, 1922.

The brush is shown lat 10, and the body portionJ has a passage or duct11, through which air under pressure 'is conducted to the 4 -front-.ofthe bru'sh, and a passage12 is ar ranged for theow of the' paint,varnish or other material that is being applied.

The nozzle is formed of two members, one the innery member 13 which issecured in place usually by screwing the part 14 into the en d ofthebarrel of the brush, thus placing the bore in' register with thepassagev12. `Surrounding the inner member, and- .`spac'edftherefrom, is theouter member 16 52 which is usually fastened lby the screwthreadedportion 1 7 fitting over'the screwthreaded end of the barrel of thebrush` and' being thus not only held in place, but being adjustablerelative to the inner member, and,

when 1ad]usted, the outer member is locked by the lock nut 18.

` The inner wall 19 of the outer member is tapered, and since thenozzles are usually 'rounded it forms a cone-shaped interior, at

the small end of which is arran ed the outlet 20 which is substantiallyin line with the bore 15 .of the inner member. The outer wall or face 20of the inner member is also tapered, but ata less angle to thelongitudinal axis of the nozzle than the wall 19, so

that these walls conver e, forming a more restricted passage as t eoutlet 20 is approached. p

This" structure is of decided advantage over those in .which the wallsof the inner and outer members are parallel, or in which 'the airissubjected to a quick change in direction, in that it eliminates the backpressure to a greatv extent and increases the velocity where the airpasses the outlet of the inner member and picks up the material to beappliedto atomizers, this velocity in the air being supplied withoutincreased pressure, so 'that a brush supplied with this nozzle finelyvaporizes and forms into a mist materialv which, with the other types ofnozzle, requires a very high pressure of air, and

does it with a relatively low pressure.

If the material is to be given a rotary movement while it is leaving andafter it leaves the nozzle, I may give-the air a helical path of travelby placing a helical element, such as the rib 21, on the outer member,shown in Figure 3, or the rib 22 on the' inner member, which is shown inFi re 4. Furthermore,a more concentrated e ect for such `rota-ry streamcanbe provided for by placing the short extension or boss 23 on theoutlet end of the outer member, as will beseen inFigure 3, or if it isto be given a greater spread the face of the outer member can be madeblunt, as shown at24 in Figure 4.

In Figures 5 and 6 I show a still further modified form in which .theouter member is provided with blades 25 which are arranged at an angle,as shown in Figure 6,

'and `are held so that they press against the inner member and areseated in the outer member,`such pressing being caused b small leafsprings 26 which can be inse in the shell 27 on the outer member.

The amount of air that comes through and is ejected from the nozzle canbe Vre lated by the usualvalve in apparatus of this kind, and also hyregulating the outer member relative to the inner member, as will benevident.. Y

l claim:

A nozzle for air brushes comprising an outer member with a tapered innerwall and `With an outlet at its small end, an inner member spaced fromthe outer member and having its outside wall tapered at an angle lessthan that of the Wall of the 'outer member relative to the longitudinalaxis of the nozzle, and having an outlet at its small end,

and a spiral rib on the outer face of the" inner member to project intosaid space and October, '1922.

Y C. L; REICHENBACH.

